linebackerjovanbelcherspeakingout today trying to make sense of this tragedy. >> we are overwhelmed with both sadness and confusion. >> reporter: belcher shot and killed his girlfriend, kasandra perkins, saturday. tonight her family releasing this statement saying "please keep us in your hearts and prayers, as well as the belcher family, for two lives were lost." and here inside the chiefs' practice facility, you can see his locker is still filled with all of his gear. the team says they don't know when or if his locker will be cleared out this season. the incident reignited the gun control debate. sportscaster bob costas taking a stand on sunday night football. >> if jovan belcher didn't possess a gun, he and kasandra perkins would both be alive today. >> reporter: today chiefs head coach, romeo crennel, who witnessed belcher's suicide, added his voice. >> all i know is a player with a gun and i know it's not a good thing. >> reporter: but what drove belcher to kill? was it a head injury, so common in football, or was this another tragic instance of domestic violence, which kills t